Wall covering



FIG. 1 is a front view of a new design for a wall covering;

FIG. 2 is a back view thereof;

FIG. 3 is a bottom view thereof; the top view being a mirror image of FIG. 3;

FIG. 4 is a right side view thereof; the left side view being a mirror image of FIG. 4; and,

FIG. 5 is a perspective view thereof, shown in a position of use.

The broken line perimeters surrounding the design in FIGS. 1-2 and 5 depict boundaries of the design and form no part thereof. The broken lines extending across the side and back surfaces in FIGS. 3 and 4 depict boundaries of the design and form no part thereof. The door and door frame drawn in broken line within a plane on the left hand side of the design are environmental subject matter that forms no part of the claimed design. All broken lines in the drawings are not claimed. 

CLAIM The ornamental design for a wall covering, as shown and described. 